Finding the Fourth Proportional to 291,039.77, 436,559.76 and 130,928.69

Step by Step Solution

1. Step 1: Write the proportion equation
   291,039.77 : 436,559.76 = 130,928.69 : x
2. Step 2: Convert to fraction form
   291,039.77/436,559.76 = 130,928.69/x
3. Step 3: Cross multiply
   291,039.77x = 436,559.76 × 130,928.69
4. Step 4: Simplify right side
   291,039.77x = 57,158,195,300.72
5. Step 5: Solve for x
   x = 57,158,195,300.72/291,039.77
6. Step 6: Final answer
   x = 196,393.08